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EP0998658B1 - Magnetischer positionssensor - Google Patents

Magnetischer positionssensor Download PDF

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Publication number
EP0998658B1
EP0998658B1 EP98941304A EP98941304A EP0998658B1 EP 0998658 B1 EP0998658 B1 EP 0998658B1 EP 98941304 A EP98941304 A EP 98941304A EP 98941304 A EP98941304 A EP 98941304A EP 0998658 B1 EP0998658 B1 EP 0998658B1
Authority
EP
European Patent Office
Prior art keywords
stator
rotor
position sensor
elements
sensor according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98941304A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0998658A1 (de
Inventor
Thomas Hannewald
Wolfgang Sauerschell
Andreas Wehner
Peter Wiese
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19825433A external-priority patent/DE19825433A1/de
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0998658A1 publication Critical patent/EP0998658A1/de
Application granted granted Critical
Publication of EP0998658B1 publication Critical patent/EP0998658B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields

Definitions

  • the invention relates to a magnetic position sensor, in which a magnetic field, at least two stator elements are arranged and There is a magnetic field probe in the measuring air gap between the stator elements is a means following a moving object arranged parallel to the plane spanned by the stator elements is.
  • Hall angle sensors are known, the angle-proportional signals submit.
  • a rotary movement is recorded via a Hall probe, which is in an air gap between two stator halves is trained.
  • a rotor is fixed on a shaft, which in turn is connected to the Object is connected whose change in position is to be detected.
  • the stator elements are attached to the sensor housing.
  • the Hall sensor is in the measuring air gap between the stator elements radially to the direction of rotation Shaft arranged so that its electrical connections over the stator elements protrude and establish the electrical connection are connected to an evaluation circuit on a circuit board.
  • a generic magnetic position sensor is from GB 2 272 060 A known, in which at least two stator elements in a magnetic field are arranged, the measuring air gap from the stator elements is limited and a magnetic field probe is in this measuring air gap located.
  • the magnetic field probe is direct and the stator element via an auxiliary carrier on a common carrier element arranged. In this arrangement, too, complex assembly is particularly important of the stator elements over the auxiliary carrier on the circuit board necessary.
  • the invention is therefore based on the object of a magnetic position sensor specify which is simple and inexpensive to manufacture is.
  • the object is characterized by the features of the license plate of claim 1 solved.
  • the design of the reduce magnetic position sensor and the assembly of stator elements and magnetic field probe can be shared with other electronic Components on the carrier element in a single process step respectively.
  • This angled area of the stator element can at the assembly is placed directly on the copper lamination of the circuit board and blunt, e.g. B. attached by reflow soldering.
  • the first is angled Area of the stator element to a second angled area formed parallel to the carrier element and connected to it.
  • the second angled area is flat with the copper cladding of the carrier element connected, which better adhesive strength of the stator on the carrier element. This part too is easy to attach to the support element using surface soldering.
  • stator element is a stamped and bent part formed, which rests directly on the carrier element. That so trained stator element has at least one offset, which through an opening of the carrier element inserted into it and there the opposite side is fixed.
  • stator elements The production as a stamped and bent part enables rivets to be dispensed with and washers, so that the assembly process is automated by means of soldering can be.
  • the possibilities of designing the stator elements can also be combined.
  • the magnetic field probe is radially offset from one Shaft arranged in the measuring air gap, the shaft being fixed to the rotor is connected, which is arranged in the axial direction to the stator elements is.
  • each soft magnetic rotor element has at least one circle segment and the rotor elements rigidly twisted together so that the Circle segment of the first rotor element of a segment gap of the second Is facing rotor element, the stator elements between the rotor elements are arranged and the magnetic field in an axial direction Direction generating magnet between both the rotor elements and is also arranged the stator elements.
  • the advantage of the invention is that the rigid two-part Rotor design the effects of the axial play on the sensor signal be prevented since the two occurring between rotor and stator Air gaps can be changed simultaneously in the opposite direction and thus the sum of the air gaps is always constant.
  • stator elements are also similar to a segment of a circle educated.
  • the outer radius of the circle segment is at least of a rotor element smaller than the outer radius of a stator element.
  • the magnet only has to generate an axially directed field.
  • This can be either a rotatable permanent magnet or a generated with respect to the stator fixed magnet, which in this case both as a permanent or as an electromagnet can be.
  • the magnet is a permanent magnetic ring magnet educated.
  • stator segments are always coaxial around the Axis of rotation of the rotor shaft arranged.
  • an accelerator pedal 1, z. B. an accelerator pedal of a motor vehicle, rotatably connected to the shaft 2, which in turn is rotatable in the bearing block 3 is stored.
  • the return spring 6 is supported on the one hand the accelerator pedal 1 integrally formed approach 4 and on the other a lever 5 rotatable about a shaft 8, which with its other End rubs against a rotating surface 9 of the accelerator pedal 1.
  • the housing 10 has a connector 13, which is an electrical Connection to the circuit board 14 allows the inside of the housing 10 is arranged on the projections 16 of the housing 10.
  • the shaft 2 led out of the bearing block 3 through an opening 11 receives a non-magnetic shaft 15, which is stepped.
  • the stator elements 18a and 18b are arranged on the printed circuit board 14.
  • the rotor element 17b is movable through an opening 20 in the printed circuit board 14 guided.
  • the side of the plastic shaft 15 facing away from the shaft 2 is movably guided in a receptacle 21 of the housing 10.
  • the housing 10 is with the plug receptacle 13 and the receptacle 21 integrally formed.
  • the sensor principle is shown in FIG. 3 and will be explained further below become.
  • the magnet 19 is located between rotor elements 17a, 17b soft magnetic material, which are rotated 180 ° against each other.
  • the rotor elements 17a and 17b are rigid via the plastic shaft 15 coupled with each other.
  • each rotor element has two segments 17a1, 17a2, or 17b1 and 17b2, which are arranged opposite one another.
  • the first rotor element 17a has segments which are shifted by 180 ° relative to one another 17a1, 17a2, the second rotor element 17b also has two segments 17b1, 17b2.
  • the rotor elements are in the direction of Center of rotation magnetically coupled.
  • the two rotor elements 17a, 17b are offset from each other so that the segment 17a1 of the rotor element 17a is opposite a segment gap of the rotor element 17b.
  • the segment gap is the distance between two segments 17a1, 17a2 and 17b1, 17b2 of a rotor element 17a and 17b respectively.
  • the system shown in Figure 3 has a stator arrangement, which of two segments 18a1 arranged directly next to one another, 18a2 exists.
  • the stator segments 18a1 and 18a2 are between the Rotor elements 17a, 17b arranged and form one against the other Air gap 23, in which the Hall probe 22 is arranged axially to the shaft 15 is.
  • FIG 3 shows a redundant system, in which in addition to that already explained a second pair of stator segments 18a1 and 18a2 is formed by stator segments 18b1, 18b2, which the first A pair of stator segments 18a1, 18a2 is arranged rotated by 180 °.
  • the stator segments 18b1 and 18b2 also form a measuring air gap 23, in which a second magnetic field probe 22 is arranged.
  • stator segments 18a1, 18a2, 18b1 and 18b2 with a larger outer radius R2 than the rotor segments 17a1, 17a2 and 17b1, 17b2, respectively.
  • the rotor segments have one Outer radius R1, which is dimensioned so that the Hall elements 22nd can be completely inserted into the measuring air gap without them from the rotor segment 17a1, 17a2; or 17b1, 17b2 are superimposed.
  • the magnet 19 can be dimensioned optimally because of the axial distance of the two rotor elements 17a, 17b is freely selectable.
  • Figure 3 shows an example in which a segmentation in 57 ° was made and a redundant signal is generated.
  • the rotor element 17a has two segments 17a1, 17a2 of simpler ones Stator width (57 °).
  • the rotor element 17b has a complementary structure, d. H. the gaps have an extent which is the width of the circular segments 17a1, 17a2 of the rotor element 17a correspond.
  • stator side circuit board 14
  • rotor side rotor elements 17a, 17b, magnet 19 and shaft 15
  • the rotor side on the non-magnetic shaft 15 be pre-assembled, which is then pressed onto the shaft 2.
  • the plastic body can be magnetically decoupled from the shaft 5 produce, which then consist of soft magnetic material can.
  • the shaft then no longer needs to be offset, which is also the case simplification means.
  • stator elements 18a1 and 18a2 or 18b1 and 18b2 lie directly on the printed circuit board 14.
  • stator elements 18a1 and 18a2 or 18b1 and 18b2 are as stamped and bent parts educated. Each stator element points to its outer Segment edges 29 each have an angled portion 24 or 25 (FIG. 5).
  • the Bend 24 of stator segment 18b2 forms with bend 25 of the stator segment 18b1 the measuring air gap 23, in which the magnetic field probe 22 is arranged.
  • the effective measuring area is increased without having to increase the sheet thickness of the stator. This leads to to the fact that the size of the magnet 19 can be reduced and thus the entire sensor has smaller dimensions.
  • the electrical connections 28 of the Hall sensor 22 engage in the printed circuit board 14 and are wave soldered on the underside of the circuit board 14.
  • a stator segment is shown again in FIG. 5.
  • Segment 18a1 is shown that at the edge with the largest outer radius R2 two bends 26, 27 are arranged, which in openings the circuit board 14 engage.
  • the segments 18a1, 18a2, 18b1, 18b2 attached to the circuit board 14, in which they simultaneously with Hall sensors 22 and others on the circuit board 14 arranged, not shown electrical switching elements be wave soldered in one operation.
  • FIG. 6 there are still further fastening options for the stator segments shown.
  • Figure 6.1 shows a stator element 18a1, which has a predetermined distance from the circuit board 14.
  • a right angle angled area 30 of the stator segment 18a1 or 31 of the stator segment 18a2 is blunt on the copper cladding 32 of the circuit board 14 placed and connected to this by reflow soldering.
  • the angled one Area 30, 31 serves as a spacer of the Stator segment 18a1 to the printed circuit board 14.
  • the first 90 ° bend follows 30 of the stator element 18a1, a second one angled by 90 ° Area 33, which is parallel to the circuit board and flat lies on top of it and is soldered.
  • the stator element 18a1 also forms the two angled areas 30 and 33 a U rotated by 90 °.
  • Both in the variant according to Figure 6.1 and in the embodiment according to Figure 6.2 form the first bends 30 of each stator segment the first bend 31 of the stator segment adjacent to it in parallel the measuring air gap 23, in which the Hall probe 22 is arranged is.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
EP98941304A 1997-07-23 1998-07-08 Magnetischer positionssensor Expired - Lifetime EP0998658B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19731554 1997-07-23
DE19731554 1997-07-23
DE19825433 1998-06-06
DE19825433A DE19825433A1 (de) 1997-07-23 1998-06-06 Magnetischer Positionssensor
PCT/EP1998/004236 WO1999005475A1 (de) 1997-07-23 1998-07-08 Magnetischer positionssensor

Publications (2)

Publication Number Publication Date
EP0998658A1 EP0998658A1 (de) 2000-05-10
EP0998658B1 true EP0998658B1 (de) 2001-12-05

Family

ID=26038499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98941304A Expired - Lifetime EP0998658B1 (de) 1997-07-23 1998-07-08 Magnetischer positionssensor

Country Status (7)

Country Link
US (1) US6400144B1 (pt)
EP (1) EP0998658B1 (pt)
JP (1) JP4076116B2 (pt)
BR (1) BR9811540B1 (pt)
ES (1) ES2169544T3 (pt)
MY (1) MY123940A (pt)
WO (1) WO1999005475A1 (pt)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786266B1 (fr) * 1998-11-20 2001-01-19 Moving Magnet Tech Capteur de position a sonde de hall
US6426619B1 (en) * 1998-12-09 2002-07-30 Cts Corporation Pedal with integrated position sensor
DE19917467A1 (de) * 1999-04-17 2000-11-16 Bosch Gmbh Robert Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels
GB2352522B (en) * 1999-05-28 2003-08-06 Caithness Dev Ltd A sensor
GB9912386D0 (en) * 1999-05-28 1999-07-28 Caithness Dev Limited A sensor
US6577119B1 (en) 1999-12-01 2003-06-10 Sena Yaddehige Pedal position sensor with magnet movable relative to a magnetic field sensor located in a stator channel
US6563412B2 (en) * 2001-05-08 2003-05-13 Harold Beck And Sons, Inc. Rotary variable differential transformer
JP4034691B2 (ja) * 2003-05-09 2008-01-16 ミネベア株式会社 回転角度センサー
US7984662B1 (en) * 2003-11-17 2011-07-26 Hydro-Gear Limited Partnership Vehicle direction sensing mechanism
GB2416826A (en) * 2004-08-06 2006-02-08 P G Drives Technology Ltd Control input device with two magnetic sensors for fail-safe sensing
WO2006078579A2 (en) * 2005-01-18 2006-07-27 Teleflex, Incorporated Pedal kickdown mechanism and treadle attachment mechanism
US8667937B2 (en) 2011-03-07 2014-03-11 Caterpillar Inc. Apparatus for sensing cam phaser position
US9417098B2 (en) * 2011-07-18 2016-08-16 Honeywell International Inc. Stationary magnet variable reluctance magnetic sensors

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276346B (de) 1961-09-15 1968-08-29 Gen Precision Inc Elektrischer Messumformer unter Verwendung von Hallgeneratoren
DE1264585B (de) 1961-09-22 1968-03-28 Gen Precision Inc Elektromagnetischer Drehgeber
FR1375070A (fr) 1963-07-05 1964-10-16 Csf Appareils électriques tournants à effet hall
JPS5613244B2 (pt) * 1974-07-31 1981-03-27
FR2331774A1 (fr) 1975-11-12 1977-06-10 Radiotechnique Compelec Procede de reperage dynamique de positions particulieres de pieces mobiles a l'aide d'un cristal a effet hall et dispositifs de mise en oeuvre du procede
WO1982002447A1 (en) * 1981-01-09 1982-07-22 Stoneham Victor Anthony Apparatus for detecting the angular positioning of a fruit machine reel
US4914389A (en) * 1988-10-24 1990-04-03 Eaton Corporation Multiturn shaft position sensor with backlash compensation
KR960000342B1 (ko) 1989-03-14 1996-01-05 미쯔비시 덴끼 가부시끼가이샤 홀 효과형 센서 장치
US5300883A (en) 1992-06-30 1994-04-05 North American Philips Corporation Position sensor with variably coupled magnetic field conducting means
GB2272060B (en) * 1992-10-29 1996-05-22 Rolls Royce & Ass Improvements in and relating to position responsive apparatus
US5444369A (en) * 1993-02-18 1995-08-22 Kearney-National, Inc. Magnetic rotational position sensor with improved output linearity
EP0620647A3 (en) * 1993-04-14 1995-09-06 Namco Controls Corp Magnetically activated proximity switch.
DE9406788U1 (de) 1994-04-23 1994-07-07 Ab Elektronik Gmbh, 59368 Werne Einrichtung zur Ermittlung des Drehwinkels eines Drosselklappenwellenelements
US5798639A (en) 1994-03-04 1998-08-25 Cts Corporation Rotary position sensor with improved bearing tolerance
US5811968A (en) 1996-01-06 1998-09-22 Unisia Jecs Corporation Rotation angle sensor
WO1997043602A1 (de) * 1996-05-11 1997-11-20 Itt Manufacturing Enterprises, Inc. Vorrichtung zum erfassen rotatorischer bewegungen

Also Published As

Publication number Publication date
MY123940A (en) 2006-06-30
BR9811540A (pt) 2000-08-22
US6400144B1 (en) 2002-06-04
EP0998658A1 (de) 2000-05-10
JP2001511513A (ja) 2001-08-14
WO1999005475A1 (de) 1999-02-04
BR9811540B1 (pt) 2008-11-18
US20020036495A1 (en) 2002-03-28
ES2169544T3 (es) 2002-07-01
JP4076116B2 (ja) 2008-04-16

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